Condensing system



Nov). 23, 1926. 1,607,814

E. H. BROWN CONDENSING SYSTEM Filed Jan. 14. 1922 Patented Nov. 23,1926.

hllTE STATES PATENT orric.

EDWIN I-I. BROWN, OF MILWAUKEE, J/ISCOTlTSIN, ASSIGNOB TO ALLIS-CHALMERSMANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OFDELAWARE.

CONDEN'SING SYSTEM.

Application filed January 14, 1922. Serial No. 529,169.

This invention relates in general to improvements in the art of coolingsubstances, and relates more specifically to an improved system offorcing some or all of the liquid propelled by a pump, through aheattransfer device such as a steam condenser or engine cooling jacket;

An object of the invention is to provide an improved cooling systemespecially applicable to engine driven pump units embodying a heattransfer device, which is simple in construction and economical inoperation.

In the operation of steam engine driven pumps, it has heretofore beenproposed to utilize the liquid propelled by the pump, as a coolingmedium for condensing the eX- haust steam delivered from the engine. Inthe prior condensing systems of this type, circulation of cooling liquidthrough the condenser has been eiiected in practice by means of specialauxiliary pumps operated from some outside source, although it has alsobeen suggested to merely by-pass a portion of the liquid passing themain pump, through the condenser without the aid of an auxiliary pumpingdevice. The prior auxiliary pumping devices employed to produce Iorcedcirculation of the cooling liquid, are ordinarily located in some remoteportion of the pumping station thereby making it necessary to providespecial attendance for the auxiliary pumping devices. In cases where theauxiliary pumps are necessarily of large capacity, the power and thelubrication required to maintain proper operation, also become items ofconsiderable expense. For these reasons it is desirable to eliminatesuch auxiliaries wherever possible. In order to insure propercirculation or" the cooling liqaid in a by-pass system, it is, however,necessary to employ some means otherthan the natural flow created by themain pump as heretofore suggested, to urge the cooling liquid throughthe condenser. T he present invention contemplates the provision ofmeans operable by the liquid pumped by the main unit, for producingforced circulation of cooling liquid through a condenser, the operationof the means forming the subject of the present invention being entirelyautomaticand thereby eliminating the services of an attendant. Inaccordance with the present invention, the forced circulation throughthe condenser is effected by means of one or more ejectors operable bythe liquid pumped by the main unit to urge more or less 01: this liquidthrough the condenser.

A clear conception of several embodiments of the invention and of themode of operating installations embodying the same, may be had byreferring to the drawing accompanying and forming a part of thisspecification, in which like reference characters designate the'same orsimilar parts in the several views.

Fig. 1 is a diagram illustrating a steam engine driven pumpingunithaving one form of improved condensing system associated therewith.

Fig. 2 is a diagram illustrating a steam engine driven pumping unithaving another form of improved condensing system associated therewith.

Fig. 3 is a diagram illustrating a steam engine driven pumping unithaving still another form of improved condensing system associatedtherewith.

In each of the units illustrated, a liquid pump 4 having a suction pipe2 anddischarge pipe 5, is connected to and is adapted to be driven by asteam engine 7 having a high pressure steam supply pipe 10 and anexhaust pipe 11 associated therewith. The exhaust pipe 11 communicateswith a surface condenser 6 in which the cooling fluid and the productsof condensation are separately conducted and donot mix and from whichthe products of condensation are delivered through a discharge pipe 12.Such delivery of the products of condensation may be effected by meansof the usual pump, or by means of an automaticallyoperated ejector.

The'condenser 6 is located in a bypass which communicates with the pumpsuction pipe 2 by means of a cooling water supply pipe 8 and a coolingwater return pipe 9. The

BIS

pump 4 and engine 7 may be of any convenient type, either reciprocatingor rotary, andmay be either direct or otherwise connected. i

In the installation illustrated in Fig. I, the

section of the suction pipe 2 located between the.v tr c u es. of; F gs,1, and 2: have. been the cooling Water supply and return pipes 8, 9, hasa converging portion 3, While the portion 18 of the suction pipe 2located beyond the return pipe 9 is formed gradually diverging. Thereturn pipe 9 communicates with the suction pipe 2 beyond theconstriction formed at the junction of the converging and divergingportions 3, 13, through an annular series of relatively small orifices14 which preferably extend in the general direction of fiow of fluidthrough the suction pipe 2. This association of elements forms a liquidactuated automatic ejector operable by the suction flow and adapted toWithdraw cooling liquid from the condenser 6 through the return pipe 9.The cooling liquid delivered to the condenser 6 through the supply pipe8 is Withdrawn from the suction pipe 2 through an annular series oforifices 15 which preferably extend away from the suction pipe 2 in thegeneral direction of flow Of fluid thcrethrough.

Int-he installation illustrated in Fig. 2, the circulation of coolingliquid through the condenser 6, is effected by means of an automaticliquid operated ejector 17 located in the supply pipe 8 and operable bymeans of high presiure liquid derived from the main pump discharge pipeThe ejector actuating liquid is Withdrawn from the discharge pipe 5through pipes 19, 16, and an additional high pressure liquid supply pipe20 may be provided in order to augment the circulation of cooling liquidwhen the normal. travel of the suction How to the pump at isinsufficient to produce efiicient operation of the ejector. The flow ofliquid through the pipes 19, 20 may be controlled by means of valveswhich may be located in proximity to the engine 7 to permit theirmanipulation by the engineer in charge of this engine. In thisinstallation, cooling liquid is Withdrawn from the suction pipe throughan annular series of orifices 15 as in Fig. l, and is delivered throughthe condenser 6 and the return pipe 9 by means of the ejector 17. Theportion 18 of the suction pipe 2, located between the supply and returnpipes 8, 9, is preferably of smaller diameter than th portion of thesuction pipe 2 located in ad vance of the supply pipe 8, While the finalportion 21 of the suction pipe 2 also has decreasing cross-sectionalarea approaching the pump 4-. By thus constructing the suction pipe 2 ofgradually decreasing crosssectional area, the velocity of the suctionflow is augmented as the pump, 4 is ap preached, such increase in thevelocity of flow tending to aid the delivery of cooling rom the, e urnpipe 9 hr ugh. the an ula ser e of orifice 22.-

In the installation illustrated in 8,

cmbine to p oduce. inst llat na aying a plurality of automatic liquidactuated ejectors for creating the flow of cool'ag med i The details ofconstruction of this lation will be apparent from the fore g U desc=iption, the special advantage resulting from a combination of thestructures previously described, being the production of a more rapidflow o1 cooling medium through the condenser 6.

During normal operation of an installation embodying the presentinvention, the suction flow created by the main pump l in the suctionpipe 2 is partially diverted through the condenser 6 to perform therequired condensing function. The quantity of liquid diverted throughthe condenser 6 may be regulated by valves suitably positioned. With thevalve in the pipe 19 open, circulation of cooling medium will beginimmediately upon operation of the engine 7 and pump 4., ant will ceaseWith discontinuance in operation of these machines. it will be obviousthat with this arrangement or" elements, forced circulation of coolingmedium is automatically produced and it is unnecessary to provide meansother than the main pumping unititself in or or to operate thecirculating ejectors. The system is entirely automatic in operation andrequires obsolutely no attention after it has been set in operation,thereby eliminating necessity of providing an attendant such as wasrequired with the systems of the prior art.

it should be understood that it is not de sired to limit the inventionto the exact details oli' construction and operation herein described,for various modifications may occur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. In combination, a pump having suction and discharge conduits, a steamengine for operatn'ig said pump, a condenser for steam exhausted by saidengine, means forming passages leading from one of said pump conduits tosaid condenser and from said condenser to said conduit, and an ejectorfor producing a flow of condensing liquid only through said passages andthrough said condenser.

2.v In combination, a pump having a suction conduit, a steam engine foroperating said pump, a surface condenser for steam exhausted by saidengine, means forming passages leading from said pump conduit to saidcondenser and from said condenser to said conduit, and an ejector forproducing a lion: of condensing liquid only through said passages andthrough said condenser.

3,. lncon' hination, a pump, a suction conduit for said, pump, a steamengine for operating said; pump, a condenser for steam exhausted byengine, discharge and. return means 0t. communication. between. saidsuction conduit and said condenser, and a lit) fluid actuated ejectorfor producing a flow. of condensing liquid only through said condenserand through said means. i 4,. In combination, a pump having a suctionconduit, a steam engine for operating said pump, a condenser for steamexhausted inventor is afiixed hereto. by szud engine, a by-pass fromszud suctlon EDWIN H. BROWN.

conduit passing through said condenser, and a fluid actuated ejector forurging only condensing fluid through said by-pass and for returning saidflow to said suction conduit.

In testimony whereof, the signature of the

